The Wandel & Goltermann ANT-20E is a portable network tester for SDH and SONET backbone analysis in field and laboratory environments. This advanced instrument resolves signal structures down to the lowest protocol layers at speeds up to 2.5 Gbit/s, delivering fast, accurate measurements for installation, maintenance, and troubleshooting. An evolution of the ANT-20 platform, the ANT-20E provides extended capabilities through additional expansion slots and supports simultaneous testing of jitter, performance metrics, ATM parameters, and overhead analysis. The device was also marketed under the JDSU brand.
Technical Specifications
Signal Analysis
• Operates at speeds up to 2.5 Gbit/s
• Jitter and wander generation/analysis: up to 2.488 Mbit/s (ITU-T Rec. O.171, O.172 compliant); jitter support to 622 Mbps
• Performance analysis per G.826 and M.2100 standards
• PDH and SDH evaluation per ITU-T G.821 (ES, EFS, SES, DM, UAS) and M.2100 (ES, EFS, SES, UAS)
Optical Interfaces
• STM-1/4 and OC-1/3/12 at 1310 nm and 1550 nm
• STM-64/OC-192 options (1550 nm available)
Electrical Interfaces
• G.703 for PDH signals
• BERT (Bit Error Rate Test) interfaces
• V.11 for DCC (Data Communications Channel)
Data Connectivity
• Ethernet, GPIB, RS-232/V.24
– Key Features
• SOH/TOH and POH byte capture with trigger event detection
• K1/K2 byte analysis and extended overhead monitoring
• Error and alarm generation and analysis
• APS (Automatic Protection Switching) testing with switch-over time measurement and protocol procedure validation
• Expandable to ATM (Asynchronous Transfer Mode) tester functionality
– Typical Applications
• SDH/SONET network installation verification
• Field maintenance and troubleshooting
• Protection switching performance assessment
• Multi-parameter simultaneous testing
– Compatibility & Integration
Supports integration via Ethernet, GPIB, and serial interfaces for automated test environments. Optical module options enable operation across standard telecom wavelengths.
